SU1057803A1 - Testing machine - Google Patents

Abstract

A TESTING MACHINE, a booster frame, a hydraulic chamber installed in the chamber, a pressure source & nv connected to the chamber cavity, a shunzh for interaction with the specimen, and a casing block simplifying the design and expanding the range of the samples in hardness, elements that ensure.: rigidity of the loading system, higher; veva in the form of thin plates, hermetically closed on the open chamber, the plunger is made stepwise, its horse is blunt) of the end face, the contact is “1 liter with olasganas, less than the plate area, located under pressure among. (L

Description

ate

GS 11 The invention relates to techniques and materials strength testing, in particular, to the compressive testing of specimens of fragile materials. A known hydraulic compression testing machine, comprising a base, mounted on it a hydraulic cylinder with a plunger, a movable yoke, connected to the base of a diameter of threaded heads, and a control panel ll. A disadvantage of the known machine is Bom, that the study of samples of fragile materials is limited to the pre-destructive characteristics area. If the specimen strength is exceeded, a sudden realization of the energy accumulated in the hydraulic cylinder and a sharp increase in the plunger displacement speed will occur. The sudden realization of accumulated energy at the time of the excess of the carried / gcey ability of the sample is due to the lack of rigidity of the loading IBS; Closest to the invention of the technical essence and the effect achieved is a testing machine containing a frame, a hydraulic j chamber installed in it, a pressure pressure source connected to the cavity of the chamber, a plunger for interaction with the sample, a load-bearing unit and elements providing the rigidity of the loading system The elements are made in view of the sinews mounted in the frame parallel to the sample, of the rods, which interact with the plunger 2. The disadvantage of such a machine is the complexity of the design, due to the necessity By using rods made in height and diameter with high accuracy and high-power presses to deform Kpofvie rods, the range of test specimens is limited in terms of hardness by the existing set of rods of the load and defrosting range. The purpose of the invention is to simplify the design and expand the range of test specimens in terms of hardness. This goal is achieved by the fact that, on a testing machine containing a frame, a hydraulic chamber installed in it, a pressure source connected to the chamber cavity, a plunger for interacting with the sample, a measuring unit and elements that provide the rigidity of the loading system, are in the form of a set of thin plgutins tightly fixed on the open end of the chamber, the plunger is filled with CT Tishchatym, the area of its larger end is in contact with the plates, less than the area of the plate under the pressure of the medium. FIG. Figure 1 shows the scheme of production and production; in fig. 2 - curve isan-deformation obtained by testing a sample of rock. The machine contains, frame 1, a hydraulic chamber 2 installed in it, a pressure source (not shown) connected to the PEEL 3 of the chamber 2, elements that provide rigidity of the loading system, made in the form of a set of thin plates 4 sealed by means of a flange 5 on the open end of the chamber 2, a stepped plunger 6, the area of the larger end of which is smaller than the area of the plate 4. under pressure of the medium, and the smaller end interacts with the sample 7, the guide sleeve 8 for the plug 6, the spring 9, clamping the plunger 6 to the plate 4, and the force-measuring unit (not shown). Testing machine works as follows. The working fluid from the pressure source is submerged in cavity 3 and, acting on the plates 4, deforms them. Deflection plates 4 through the plunger 6 load the sample 7. At the end of loading, the supply of working fluid to the cavity 3 stops and the plates 4 due to the accumulated energy of elastic deformation return to the initial position, displacing the working fluid from the cavity 3. Plunger B returns to the original. position under the action of the spring 9. Thanks: that the rigidity of the system of loading, formed by the set of plates 4 and the plunger 6 in contact with it, is at least an order of magnitude greater than the rigidity of the tested samples 7, to obtain stress-strain curves that have not only the prelimit branch and the ultimate branch AEi. Also, the values of the pre-limit (s) and total (Hg}) deformations of the sample were obtained. In the process of deformation of the sample, the plates 4 interacting with the large end of the plunger 6 work in such a way that the magnitude of the deflection at all points

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plates does not exceed their deflection. Invention. The invention simplifies the process of trial, i.e. in the process of loading the most powerful samples and allows, through the use of the deformed spring, always to heat the set of plates as Elements

to the opposite relative rigidity to expand the range of loads and

the direction of deformation of the sample - side. 5 deformations.

Claims (1)

A TESTING MACHINE, comprising a frame, a hydraulic chamber installed in it, a pressure source connected to the chamber cavity, an intruder for interacting with the sample: a power measuring unit and elements that obey the stress of the loading system, characterized in that in order to simplify the design and expanding the range of tested samples in hardness, elements ensuring the rigidity of the loading system are made in the water of a set of thin plates hermetically fixed to the open end of the chamber, the plunger is made in steps m, the area of its larger end face in contact with the plates, smaller than the area of the plate under pressure with sre-> 1 10